More latency in ubuntu studio?

I’ve been playing with Ardour in my normal Xubuntu 20.04 desktop. I installed Ubuntu Studio thinking it would be a better experience with the more suitable scheduler and all, but I’m finding that in Studio I have to bump my buffer size up to almost 7ms latency to avoid x-runs. On my regular xubuntu desktop I can drop it down to 2ms and never have a problem.

I’m pretty new to this but I’m surprised that Studio would be giving me worse performance somehow. I must be missing something here. Any hints to what it might be?